Is it possible that my new Brinsea's humidity gauge is off?

I'm on day 22 now with no action coming from the eggs. During the whole hatch I had the temp set at 99.6-99.7, with relative humidity at 45% with just that telling me the temp (I assume it would be correct).
Well I decided to just put in the thermo/hygrometer that I used with my last hatch just to check. It says 90% humidity! I don't know what to do. I'm hoping it's just in shock of going from dry and chilly to hot and humid. But if that's what's going on, then my eggs have been under probably 60% humidity during the first 18 days. I don't know what to do...

Edited to add: I'm going back to school and I'll be back in a few hours, will let you know what I see when I get back.

If your humidity was truly that high from day 1 then I doubt any will hatch because they will have drowned. If it was only that high since lockdown you might still be ok. If you don't have any pips open it up and candle one and see what your aircell looks like.

I'm guessing the humidity was about 50-55% for the incubation period. I have adjusted the temp/humidity just a little bit, hoping that'll help. With the actual temperature being lower than planned I'm hoping they're just developing a little slower. I'm not going to give up on these babies yet, though...

No if your temp was low they will develop and hatch slower. Don't give up yet. Like I said if you have no pips then pull the lid off and candle one or two quick and see if you see good aircells and movement!! Good luck.

Well, good news. I'm not candling because I've got a zipper! I didn't even know the little one pipped until I was getting ready for bed and heard a high pitched peeping coming from the bator! I looked and BOOM, there's a zip halfway around the egg! Speedy little sucker!